Locking pen and pencil compass and divider



Oct. 20, `1953 E. M. vARoNA ET AL 2,655,727

LOCKING PEN AND PENCII.. COMPASS rAND DIVIDER Filed oct. 18, 195o` A l 1 E2;

ATTORNEYS Patented Oct. 20, 1953 UNITED STATE e YENT OFFICEv LOCKING PEN AND PENCIL COMPASS AND DIVIDER Eulalio MfVarona, Oscar B. Varona, and Olivio B. Varona, Manila, Republic of Philippines, assignors of one-half to Manuel Salientes, Jose B. Ramos, and Ciriaco Montano, all of Washington, D. C., jointly Application October 18, 1950, Serial No. 190,756

7 Claims.

ment having cam locking means included therein wherein points may be set to dimensions and readily locked in the positions to which they have been set.

In the conventional type of compass and divider points or a point and a pencil or pen are accurately adiusted to a dimension and it is diiiicult to lock the points or the point with the pencil or pen in the adjusted position. With this thought in mind this invention contemplates a combination drawing instrument having three members pivotally mounted on a common pin with points adjustably mounted in two of the members and with a bar having a drawing pen on one end and a pencil point on the other removably mounted on the third member, and with the members provided with hubs having cam surfaces positioned to lock two of the members as a third member is moved upwardly.

The object of this invention is, therefore, to provide, in a combination drawing instrument having three legs, means for locking two of the legs by a third leg.

Another object of the invention is to provide a combination drawing instrument that may readily be converted from a pencil compass to a compass having a pen therein whereby lines described by the pencil may be inked with the same instrument.

A further object of the invention is to provide a combination drawing instrument having divider and pen and pencil compass elements with locking means incorporated in the elements, which is of a simple and economical construction.

With these and other objects and advantages in view the invention embodies a center leg having a point adjustably mounted in one end with a hub having cam surfaces on the ends thereof positioned on the opposite end, a coacting leg also having a point adjustably mounted in one end and having a hub with a cam shaped inner sur- The invention also includes a. drawing instruface on the other positioned to coact with the cam surface on one side of the hub of the center leg, and a compass leg having pen and pencil points on opposite ends of a bar carried thereby also having a cam surface on a hubat the upper end positioned to coact with the cam surface of the hub of the center leg, and a pin pivotallyl retaining the legs in assembled relation.

vOther features and advantages of the invention will appear from the following description taken,

in connection with the drawings wherein:

Figure 1 is a front elevational view of the combination instrument with part of one of the legs thereof broken away showing the adjustable mounting of a point in the end thereof.

Figure 2y is a similar elevational View showing thedivider points extended for use with the pen and pencil mounting bar removed.

Figure 3 is a detail illustrating an elevational.

t view of the pen and pencil point mounting bar.

Figure 4 is a detail on an enlarged scale showing the mounting of the pen nibs in the end of.

the bar.

Figure 7 isa cross section taken on lline I-I of Figure 3 showing the collar for securing the` pencil point in the end of the pen and pencil mounting bar. y

Figure 8 is a detail showing an exploded viewV illustrating the hub at the upper end of the leg and showing the hub separated.

Figure 9 is a detail illustrating a section-` through the hub of the legs showing the pin ex-l tended through the hub and showing the partsin the free position.

Figure 10 is `a 'similar view showing the side leg moved upwardly to the locking position.

Referring now to the drawings wherein like reference characters denote corresponding parts the combination drawing instrument of this invention includes a center leg I0, a coacting divider leg II, a compass leg I2, a pin I3 for pivotally connecting the legs `and a mounting bar I4 having a pen I5 on one end and a pencil point I6 clamped in the opposite end.

The center or rst leg Il) is formed as illus;

trated in Figures 1 and 8 with a point I'I adjustably secured in a socket I8 by a set screw I9..

Iand with a hub 20 on the upper end, the ends of which are provided with cam surfaces 2| and 22. The hub 20 may also be provided with a knob 23 by `which vthe, instrumentmaybe held in use, and the intermediate part thereof is provided With 'an opening 24 through which the pin I3 extends, as shown in Figure 9.

The divider leg II is provided with =a similar socket 25 in the outer end inywhigha poinug is adjustably held by la set screw 21, and the opposite end is provided with' ahubn28-having a cam 'surface 29 thereon havin-ga peri-t ing 30 extended therethrough for receiving the' pin I3. The compass leg I2 is also provided with a hub, as indicated by the numferalmSI andA thehinner surface of this hub is provided with a cani surface 32 and an opening 33 extends through the hub for receiving the pin I3. The outer Seriate.. Qf .thee- 1lb .may ,beiQQ- lmiersuek at irilicatedat the point 34 to receive the head of thiir lower-Panfili the, QFMQLSS.lQgZShlQ- een heid .and with .positioned between the. ears Qi the les ier 31, slideioiy,inoiiiiteduohthehar I4, rdlybve'r, th. law rend ?8 0f. th .he een and pencil point.

tween sar@ and .35 end aeeiristthe, Liiiersiirfeeeof the. he l2.. .The hert @the lanterne iireii'dd with Siaeeirist v vhijoh ,the hier i4 may be poed, as shown i p'enoii point It between the jaws- 'A slot 41 may be provided through the upper end of the bar to ,proigiriefresiiienoy ih the supporting 'eiefiehts @Unents- The pin I3 is 'provided with coiterfs'uhk head 0 ande, nat head `5 I,I is proti'ded `on the oiiifsije .jerid s shov'm iii 9 dhd10;

with the pertsrrehfged iri this manner the instrument may bie fuidfas .a pair `'o'f dividers, es illustrated Figure;d and with the points eet to dimension e third or tojrnpes'e ieg I3 is nidi/ed i'ih'vver'diif to iooir the rege 'carrying the, points inw position.A u

The, -rri surfaces are 'sloped at an angle of less `'than QQ de'gie'es to the 'axes 'of the'hubs 'of the ,pertejvherietv iii'oii/erdA movement of 'either of 'the ieee gi and fizs'ore'edethe 4niih ioiigitirT d` a, pif .the causes a pla'mpingnaction wlrnfchlockys the legs in the position 'to which thier have bee'eet.. when itis desired to use the device 'as fa pen'- o'ii oomp'ess the'positio 'f th bt'r I4 ie reversed whereby the pencil D'ir'lt I `j 'ds downwardly, oifp'ole 'eto the poeition'iiistreted inw-rigore 1 and when it is deeiredto use the 'devise perl otite-eee the her r4 is ioositioned Between the ears 35 and 36 and the collar 31 moved upwardly over the point 38 thereby locking the mounting bar I4 in position upon the compass leg I 2.

The ieg' gg is" also provided itithers n'5s and 51, similar to' the ears 35 and 3S', which frictionally hold the leg I D against the adjacent surface oi the leg I2 when the device is used as a reir. of dividersi. IIt will also be understood that the bar I4 may beg, removed from the,4 instrument so that the 7 x" il n'y he used independently.

Is b 'e understood that other modifi- L) sl thnthe scope of the appended claims mayrloenmade the.. design and arrangement of the parts without departing from the spirit of the iiivntio'ii.

Whatyis claimed is:

1. A drawing instrument comprising a pair of diividenlees and, a. Compass lea each of. .said use' risfhub fifi 01.19 'Q'f the e'd thereof arid said hohe hevineaiiieurfaoes on abutting facesth edf;- 'a' pin extended through the providin pivotal mounting for thehleg aii'd points @terrieri by the ends of the iegs opposite to the ends on which the hubs are positioned;

2'. drawing ihstrui'rieht comprising Aa pair of divider legs land ay compassrle'g, eaeh of said legs having hubs ohloi'i ofthe' ends thereof and said hibs` havin-g ein surfaces,l on abutting faces thereof, ahpi'n extended. through the hubs providing a piv'o'tsl 'nouritin'g 'for the legs, points carriedby 4the ends of ythe legs opposite to theI en ds o'ntvhioh the hubs arer positioned, and n'eiis adjustaiily mounting the points iii the legs.

3. A drawing instrument comprising e, pair of divider legs and a compass leg, each 'f said legs havin-'g ahubs on one of the ends thereof a'fd s'lijd'hiibs having e'am surfaces on abutting faces there'oif,l a y-pin extended through the hubs providiiigwa pii'r'otal mounting for the le'gs, points crriedfby the eiid's of the lgs opposite to .the endsc'n which the hubs yare positioned, means adjii'stehiy mounting the points in the legs, end rn'efans for reversing the position of one of the points;

.4; n1 a drawing instrument, the combination which 'comprises a pair 'of legs each having a hub on one end thereof with 'co'acting 'cam faces onth'e inner surfaces of the hubs and having point receiving sockets in the other ends of said legs, set screws positioned in said legs to ext'e'nd into said sockets', points adjustablyheld b'y'th'e set screws in the said sockets, a pinex.- tended through th'e hubs 'of the legs providing pivotal mounting means therefor', and a third leg also having a huh with a Cain surfacethereon mounted on s'ai'd pin and positioned to cooperate with the 'cam faces of the former legs whereby Y withv the legs' 'iii which the points are positioned set t'o 'a 'dimension actuation of the third leg clamps the legs carrying the points.

v5'. In a drawing instrument; the combination which comprises 'a pair o'f legs each having a hub-'on onel end thereof with coacting -carri faces on the inner surfaces of said hub's and having points on the 'pposite ends, a pin extended thr'oighhth'e hubs ofthe legs providing pivotal mounting means therefor, athird 'legr 'also hav'- ing a h ub with a h'r'n surface thereon mounted on said pin and positioned to 'cooperate with the dem 'faces 'of the fo'rier legs whereby with the iegsiriwh'ioh the pointe are dositiori'ed set to 'a dimension actuation of the third 'rg clamps the legs carrying the points, and means reversibly mounting pen and pencil points on the said third leg.

6. In a drawing instrument, the combination which comprises a pair of legs each having a hub on one end thereof with coacting cam faces on the inner surfaces of said hubs and having points on the opposite ends, a pin extended through the hubs of the legs providing pivotal mounting means therefor, a third leg also having a hub with a cam surface thereon mounted on said pin and positioned to cooperate with the cam faces of the former legs whereby with the legs in which the points are positioned set to a dimension actuation of the third leg clamps the legs carrying the points, said third leg having spaced parallel ears extended from the sides thereof adapted to hold a bar having a pencil point at one end and a pen in the other with the bar frictionally held between the ears of the said third leg and a collar slidably mounted on the bar and positioned to extend over the end of the said third leg for clamping the bar in operative position upon the third leg. i 7. In a compass, the combination which comprises a center leg having a hub with an open`- ing extended longitudinally therethrough posi,- tioned on one end and having a point on the opposite end, said hub having cam surfaces on the ends, a compass leg having a hub also with an opening extended longitudinally therethrough' on one end and having a cam surface on one end of the hub, a divider leg also having a hub with an opening extended longitudinally therethrough on one end and said hub having a cam surface on one end thereof, a pin extended through the openings of the hubs of the legs pivotally connecting the legs, said cam surfaces positioned whereby upward movement of one of the legs with the other legs extended downwardly clamps the legs preventing movement thereof, a bar removably clamped to said compass leg, and means for mounting a pencil point on one end of the bar and a pen on the opposite end of the bar.

EULALIO M. VARONA. OSCAR B. VARONA. OLIVIO B. VARONA.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 77,123 Stewart Apr. 21, 1868 215,282 NaWadny May 13, 1879 256,783 Wittmann Apr. 18, 1882 434,742 Toquet Aug. 19, 1890 496,123 Keufel Apr. 25, 1893 595,607 Coykendall Dec, 14, 1897 723,720 Ostlund Mar. 24, 1903 855,916 Werner June 4, 1907 953,026 Evans Mar. 9, 1910 1,295,841 Benjamin Mar. 4, 1919 1,900,640 Gasstrom Mar. 7, 1933 FOREIGN PATENTS Number Country Date 914 Great Britain 1885 7,997 Germany Nov. 22, 1879 170,236 Germany May 1, 1903 

